Self-cleaning device and method for filter screen of Y-shaped filter

Abstract

The invention relates to a self-cleaning device and method for a filter screen of a Y-shaped filter of a coke oven gas compressor of a hydrogen metallurgy system, a physical cleaning device is arranged on the filter screen, high-temperature and high-pressure steam is introduced, and naphthalene condensed on the filter screen is heated and sublimated by using the high-temperature and high-pressure steam; and meanwhile, other dirt attached to the surface of the filter screen is cleaned by the physical cleaning device and is taken out by high-pressure steam through the bleeder, so that self-cleaning of the filter screen is realized. The device is simple in overall structure, reasonable in design and smooth in process, continuous production of a hydrogen metallurgy system is not affected, safety of operators is guaranteed, and application and popularization are facilitated.

Description

Technical Field

[0001] The present patent application belongs to the technical field of hydrogen metallurgical coke oven gas system, and more specifically, it relates to an automatic cleaning device and method for the filter screen of a Y-type filter of a coke oven gas compressor. Background Art

[0002] The hydrogen metallurgical system is the world's first to use the coke oven gas zero reforming short-process low-temperature smelting process. During the production process, the coke oven gas purified by microcrystalline adsorption still contains impurities such as naphthalene and tar. The traditional Y-type filter is a mechanical filter. In a low temperature environment, such as winter, the naphthalene contained in it will condense into a white crystalline powder. The powder has a certain viscosity, so it sticks to the surface of the filter and blocks the filter.

[0003] At this time, the filter needs to be cleaned. Traditional filter cleaning requires stopping the coke oven gas compressor, closing the filter inlet valve, inserting a blind plate, and then manually opening the filter manhole cover to remove the filter for replacement or cleaning. This manual cleaning operation will affect the continuous production of the hydrogen metallurgical system, and frequent start-stop operations will cause wear and tear on motors, valves and other components, and also bring the risk of poisoning and suffocation to operators.

[0004] Based on this background, a self-cleaning device for the Y-type filter screen of the coke oven gas compressor in the hydrogen metallurgical system is proposed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a self-cleaning device and method for the Y-type filter screen of the coke oven gas compressor of the hydrogen metallurgical system, which can ensure the continuous production of the hydrogen metallurgical system under the low temperature environment in winter, minimize the shutdown of the coke oven gas compressor and manual cleaning of the filter, and improve production continuity and operation safety.

[0006] In order to solve the above problems, the technical solution adopted by the present invention is: A Y-type filter screen self-cleaning device, comprising a dual-path air supply mechanism, a cleaning mechanism, and a high-pressure steam introduction mechanism; The dual-path gas supply mechanism includes a coke oven gas main pipeline and a coke oven gas pipeline bypass connected to the coke oven gas. The coke oven gas main pipeline and the coke oven gas pipeline bypass are both provided with a Y-type filter. The gas inlet and outlet of each Y-type filter are connected to a valve group through a flange. A pressure sensor is installed at the upper opening on the inner side of the flange of the gas inlet and outlet. The valve group is linked to the pressure sensor. The cleaning mechanism and the high-pressure steam introduction mechanism are both linked to the valve group. The cleaning mechanism includes a discharge pipe arranged on the top of the Y-type filter, a discharge pipe electric valve installed on the discharge pipe and linked to the valve group, a drive motor linked to the valve group, a drive gear group connected to the drive motor, a screw connected to the drive gear group, a lifting mechanism rotatably connected to the screw, and a physical cleaning device connected to the lifting mechanism, and the physical cleaning device moves along the axis direction of the inner wall of the filter screen of the Y-type filter; The high-pressure steam introduction mechanism includes a high-pressure steam drum, a high-pressure steam pipeline connected to the high-pressure steam drum, and a steam pipeline valve arranged on the high-pressure steam pipeline. The steam pipeline valve is linked with the valve group. The high-pressure steam pipeline introduces high-temperature and high-pressure steam into the Y-type filter to sublime the naphthalene adhered to the surface of the filter. The high-temperature and high-pressure steam carrying naphthalene vapor and other sundries are released through the vent pipe to realize the self-cleaning function. Since it is a dual-path gas supply mechanism, the high-pressure steam pipeline is divided into two injection directions, which are respectively used to inject the filter mesh on the Y-type filter of the coke oven gas main pipeline and the coke oven gas pipeline bypass.

[0007] Furthermore, the valve group includes an electric butterfly valve and a glasses valve, and the glasses valve is closer to the Y-type filter than the electric butterfly valve.

[0008] Furthermore, the lifting mechanism is provided with a thread, which fits with the screw; the upper and lower ends of the screw are respectively connected with an upper connecting spline and a lower connecting spline, and the upper connecting spline and the lower connecting spline are respectively connected with an upper shaft and a lower shaft, and bearings are installed at the ends of the upper shaft and the lower shaft, and the bearing of the upper shaft is connected to the bearing seat inside the Y-type filter, and the center of the bearing seat and the center of the filter are on the same axis; the bearing of the lower shaft is connected to the manhole blind plate of the Y-type filter, and the protruding part of the lower shaft is connected to the driving gear set through a spline.

[0009] Furthermore, it also includes a driving box body, which is arranged below the manhole blind plate at the bottom of the Y-type filter. The driving box body includes a box body, a coupling connected to the output end of the driving motor, a threaded roller connected to the coupling, a gear matched with the threaded roller, and a mounting base arranged on both sides of the threaded roller through a bearing, the mounting base is connected to the bottom of the box body, the gear is connected to the lower shaft, and the lower shaft penetrates into the box body; an equipment mounting hole is provided on the outer wall of the box body, and the equipment mounting hole is fastened to the manhole blind plate and flange at the bottom of the Y-type filter by bolts; The drive motor, coupling, threaded roller, gears, and mounting base are all located in the box; A second pressure sensor is installed inside the nitrogen pipeline valve. The nitrogen pipeline and nitrogen pipeline valve are used to charge the drive box with nitrogen to maintain pressure. The pressure of the drive box is greater than or equal to the maximum working pressure of the coke oven gas pipeline. This is to prevent coke oven gas from entering the drive box. Nitrogen charging is to inertify the internal space of the drive box. After installation or maintenance, open the nitrogen pipeline valve to charge nitrogen to the specified pressure, and close the nitrogen pipeline valve to maintain pressure. The nitrogen pipeline valve is linked to the second pressure sensor.

[0010] Furthermore, the physical cleaning device includes a circular ring body arranged on a lifting mechanism, a flexible brush arranged on the outer wall of the circular ring body, and a connecting device arranged around the inner wall of the circular ring body and rigidly connected to the lifting mechanism. The diameter of the circular ring body should be slightly smaller than the filter net, and the outer diameter of the circular ring body after the flexible brush is bonded should be slightly larger than the filter net. After the lifting mechanism and the physical cleaning device are connected, a spoke wheel structure is formed, and the spoke wheel structure allows high-temperature steam to pass through.

[0011] Furthermore, the flexible brush is bonded to the outer wall of the annular ring, and the connecting device is a spoke, the number of which is 5 to 12.

[0012] Furthermore, an upper limit switch and a lower limit switch are installed inside the Y-type filter, and the upper limit switch and the lower limit switch are respectively set at the upper limit position and the lower limit position of the filter screen.

[0013] Furthermore, a manual valve is installed on the vent pipe, which is in a normally open state and is used to close the vent pipe when inspecting it.

[0014] A Y-type filter screen self-cleaning method, using the above-mentioned self-cleaning device, comprises the following steps: S1, the pressure sensor of the Y-type filter detects the pressure difference at the inlet and outlet to identify the degree of filter blockage; S2. When the pressure difference exceeds the set threshold, the valve group (that is, the electric butterfly valve and the glasses valve) of the Y-type filter in the bypass of the coke oven gas pipeline is automatically opened, and the valve group (that is, the electric butterfly valve and the glasses valve) of the Y-type filter in the main pipeline of the coke oven gas is closed. At this time, the coke oven gas compressor is supplied with gas from the bypass of the coke oven gas pipeline, which does not affect the continuous production of the hydrogen metallurgical system; S3, after the coke oven gas compressor switches to the coke oven gas pipeline bypass gas supply, a cleaning operation signal is given; S4. Open the discharge pipe electric valve on the discharge pipe in the Y-type filter, and the driving motor drives the screw to rotate through the driving gear set, driving the lifting mechanism to drive the physical cleaning device to move along the axis direction of the inner wall of the filter. The upper limit switch and the lower limit switch are respectively set at the upper and lower ends of the Y-type filter. The driving motor runs forward, and when the physical cleaning device reaches the upper limit position, it contacts the upper limit switch and sends a control signal to the driving motor to stop running; after the driving motor stops steadily, it switches to reverse operation, driving the physical cleaning device to run downward. When it reaches the lower limit, the lower limit switch gives a control signal, and the driving motor stops running and switches to forward operation. Repeat the above process several times to clean the inner surface of the filter; S5. At the same time, the high-pressure steam drum is passed through the high-pressure steam pipeline and the steam pipeline valve to the Y-type filter to sublime the naphthalene impurities adhered to the surface of the filter, and the high-temperature and high-pressure steam carrying naphthalene steam and other impurities is released through the vent pipe to realize the self-cleaning function; S6. After cleaning is completed, close the steam pipe valve of the Y-type filter, stop introducing steam, and lower the physical cleaning device to the position of the lower limit switch. Open the valve group (electric butterfly valve and glasses valve) at the air inlet of the Y-type filter in the coke oven gas main pipeline, and use coke oven gas to drive out the residual steam in the Y-type filter through the vent pipe. After the coke oven gas of the Y-type filter is qualified, close the valve group (electric butterfly valve and glasses valve) at the air inlet of the Y-type filter. At this time, the Y-type filter of the coke oven gas main pipeline has been cleaned and is in standby status. When the Y-type filter of the coke oven gas pipeline bypass is seriously clogged, switch to the coke oven gas main pipeline for gas supply, and clean the Y-type filter of the coke oven gas pipeline bypass.

[0015] Furthermore, in S4, the process is repeated 5-7 times.

[0016] Due to the adoption of the above technical solution, the beneficial effects achieved by the present invention are: The self-cleaning device has a simple structure, low manufacturing cost, convenient use, and easy replacement of parts, which ensures the continuous production of the hydrogen metallurgical system in the low temperature environment in winter. The self-cleaning method reduces the wear and tear of the motor, valves and other components caused by the shutdown of the coke oven gas compressor, and avoids the time-consuming and laborious manual cleaning of the filter, reduces the risk of poisoning, is safe, green and environmentally friendly, conforms to the current economic development concept, and has a high value of promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the device in the present invention.

[0018] Figure 2 The present invention is a process flow chart of the main and bypass pipelines of coke oven gas in the device.

[0019] Figure 3 It is a structural schematic diagram of the lifting mechanism and the screw in the device of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the driving box in the device of the present invention.

[0021] Figure 5 It is a structural schematic diagram of the physical cleaning device and the lifting mechanism in the device of the present invention.

[0022] Among them: 1. pressure sensor; 2. vent pipe; 3. vent pipe electric valve; 41. upper limit switch; 42. lower limit switch; 5. screw; 53. upper shaft; 54. upper connecting spline; 55. lower shaft; 56. lower connecting spline; 57. bearing; 6. connecting device; 26. high-pressure steam pipeline; 7. driving motor; 8. nitrogen pipeline; 9. driving box; 10. driving gear set; 11. lifting mechanism; 12. physical cleaning device; 13. filter screen; 14. screw bearing seat; 15. annular ring body.

[0023] 1. Coke oven gas main pipeline; 22. Coke oven gas pipeline bypass; 23. Electric butterfly valve; 24. Eyeglass valve; 25. Y-type filter; 26. High-pressure steam pipeline; 27. High-pressure steam drum.

[0024] 92. Coupling; 93. Threaded roller; 94. Gear; 96. Mounting base; 99. Equipment mounting hole. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the embodiments.

[0026] A self-cleaning device for the filter screen of a Y-type filter of a coke oven gas compressor in a hydrogen metallurgical system, such as Figure 1~Figure 5 As shown, it includes a dual-path air supply mechanism, a cleaning mechanism, and a high-pressure steam introduction mechanism.

[0027] The dual-path gas supply mechanism comprises a coke oven gas main pipeline 21 and a coke oven gas pipeline bypass 22 connected to the coke oven gas. The coke oven gas main pipeline 21 and the coke oven gas pipeline bypass 22 are both provided with a Y-type filter 25. The air inlet and outlet of each Y-type filter 25 are connected to a valve group through a flange. A pressure sensor 1 is installed at the upper opening on the inner side of the flange of the air inlet and outlet. The valve group is linked to the pressure sensor 1, and the cleaning mechanism and the high-pressure steam introduction mechanism are both linked to the valve group.

[0028] The realization of linkage is generally coordinated by the central control device. The central control device is connected to the valve group. At the same time, the central control device is also connected to the pressure sensor 1, the cleaning mechanism and the high-pressure steam introduction mechanism. In this way, the linkage is realized through the central role of the central control device. The linkage involved later is all based on the above-mentioned central principle. The central control device can be a central control room or a special PLC. There is no restriction on the selection of specific models, etc., as long as it can meet the central coordination and processing function.

[0029] The cleaning mechanism includes a vent pipe 2 arranged at the top of the Y-type filter 25, a vent pipe electric valve 3 installed on the vent pipe 2 and linked to the valve group, a drive motor 7 linked to the valve group, a drive gear group 10 connected to the drive motor 7, a screw 5 connected to the drive gear group 10, a lifting mechanism 11 rotatably connected to the screw 5, and a physical cleaning device 12 connected to the lifting mechanism 11, and the physical cleaning device 12 moves along the axial direction of the inner wall of the filter screen 13 of the Y-type filter 25.

[0030] The high-pressure steam introduction mechanism includes a high-pressure steam drum 27, a high-pressure steam pipeline 26 connected to the high-pressure steam drum 27, and a steam pipeline valve arranged on the high-pressure steam pipeline 26. The steam pipeline valve is linked with the valve group. The high-pressure steam pipeline 26 introduces high-temperature and high-pressure steam into the Y-type filter to sublime the naphthalene adhered to the surface of the filter screen 13, and the high-temperature and high-pressure steam carrying naphthalene vapor and other sundries is released through the vent pipe 2 to realize the self-cleaning function. Since it is a dual-path gas supply mechanism, the high-pressure steam pipeline 26 is divided into two injection directions, which are respectively used to inject the filter screen 13 on the Y-type filter 25 of the coke oven gas main pipeline 21 and the coke oven gas pipeline bypass 22.

[0031] The valve group includes an electric butterfly valve 23 and a glasses valve 24. Figure 2 It can be seen that the glasses valve 24 is closer to the Y-type filter 25 than the electric butterfly valve 23. Since linkage is required, the central control device is also connected to the electric butterfly valve 23 and the glasses valve 24.

[0032] like Figure 3 , a thread is provided inside the lifting mechanism 11, and the thread fits with the screw 5; the upper and lower ends of the screw 5 are respectively connected with an upper connecting spline 54 and a lower connecting spline 56, and the upper connecting spline 54 and the lower connecting spline 56 are respectively connected with an upper shaft 53 and a lower shaft 55, and the ends of the upper shaft 53 and the lower shaft 55 are both installed with bearings 57, and the bearing 57 of the upper shaft 53 is connected to the bearing seat inside the Y-type filter 25, and the center of the bearing seat is on the same axis as the center of the filter 13; the bearing 57 of the lower shaft 55 is connected to the manhole blind plate of the Y-type filter 25, and the protruding part of the lower shaft 55 is connected to the driving gear set 10 through a spline.

[0033] like Figure 4, and also includes a drive box 9. Next, the drive box 9 is described. The drive box 9 is arranged below the manhole blind plate at the bottom of the Y-type filter 25. The drive box 9 includes a box, a coupling 92 connected to the output end of the drive motor 7, a threaded roller 93 connected to the coupling 92, a gear 94 matched with the threaded roller 93, and a mounting base 96 arranged on both sides of the threaded roller 93 through a bearing 57. The mounting base 96 is connected to the bottom of the box, and the gear 94 is connected to the lower shaft 55, and the lower shaft 55 penetrates into the box; the outer wall of the box is provided with an equipment mounting hole 99, and the equipment mounting hole 99 is fastened to the manhole blind plate and flange at the bottom of the Y-type filter 25 by bolts.

[0034] The driving motor 7, the coupling 92, the threaded roller 93, the gear 94 and the mounting base 96 are all located in the box.

[0035] It can be seen that the drive housing 9 carries the drive motor 7 and the threaded roller 93 by the mounting base 96 of the drive device. The drive motor 7 provides power through the coupling 92 and the axial threaded roller 93. The thread of the axial threaded roller 93 fits with the gear 94, and the lower shaft 55 of the screw 5 is driven to rotate through the gear 94. The entire drive housing 9 is fastened with bolts through the equipment mounting hole 99 and the manhole blind plate and flange at the bottom of the Y-type filter.

[0036] In order to prevent the coke oven gas from entering the drive box 9 through the gap of the lower shaft 55 of the screw 5, a nitrogen pipeline 8 is also connected to the bottom of the box, and a nitrogen pipeline valve is provided on the nitrogen pipeline 8. A second pressure sensor is installed inside the nitrogen pipeline valve. The nitrogen pipeline 8 and the nitrogen pipeline valve are used to fill the drive box 9 with nitrogen to maintain pressure. The pressure of the drive box 9 is greater than or equal to the maximum working pressure of the coke oven gas pipeline. Here, in order to prevent the coke oven gas from entering the drive box 9, the nitrogen filling is to inertify the internal space of the drive box 9. After installation or maintenance, the nitrogen pipeline valve is opened to fill nitrogen to the specified pressure, and the nitrogen pipeline valve is closed to maintain the pressure. Nitrogen is injected into the drive box 9 through the nitrogen pipeline 8 and the nitrogen pipeline valve to fill nitrogen and maintain pressure. The nitrogen pressure in the drive box 9 is greater than or equal to the coke oven gas pipeline pressure. The nitrogen pipeline valve and the second pressure sensor are linked through the central control device, that is, the nitrogen pipeline valve and the second pressure sensor need to be connected to the central control device. The central control device is described above. After the first installation or overhaul, the drive box should be filled with nitrogen to inertify the space inside the box, and the pressure can be maintained after filling with nitrogen.

[0037] like Figure 5The physical cleaning device 12 includes a ring body 15 arranged on the lifting mechanism 11, a flexible brush arranged on the outer wall of the ring body 15, and a connecting device 6 arranged around the inner wall of the ring body 15 and rigidly connected to the lifting mechanism 11. The diameter of the ring body 15 should be slightly smaller than the filter 13. After the flexible brush is bonded, the outer diameter of the ring body 15 should be slightly larger than the filter 13. After the lifting mechanism 11 and the physical cleaning device 12 are connected, they form a spoke wheel structure, which allows high-temperature steam to pass through. The flexible brush is bonded to the outer wall of the ring body, and the connecting device 6 is a spoke, and the number of spokes is 5 to 12.

[0038] exist Figure 1 In the embodiment, an upper limit switch 41 and a lower limit switch 42 are installed inside the Y-type filter 25, and the upper limit switch 41 and the lower limit switch 42 are respectively set at the upper limit position and the lower limit position of the filter screen 13. A manual valve is also installed on the discharge pipe 2, and the manual valve is in a normally open state and is used to close when inspecting the discharge pipe.

[0039] By using the above self-cleaning device, this device installs a bypass system on the original coke oven gas compressor intake pipe, corresponding to Figure 2 When one of the air intake systems of the coke oven gas main pipeline 21 and the coke oven gas pipeline bypass 22 is blocked, the main and bypass air supply can be switched by closing and opening the electric butterfly valve 23 and the glasses valve 24 (also called electric blind plate valve) to provide working conditions for the filter self-cleaning device. Therefore, the present invention also provides a Y-type filter self-cleaning method, which specifically includes the following steps: S1, the pressure sensor 1 of the Y-type filter 25 detects the pressure difference at the inlet and outlet, and identifies the degree of clogging of the filter 13; S2. When the pressure difference exceeds the set threshold, the valve group (electric butterfly valve 23 and glasses valve 24, glasses valve 24 is also called 8-shaped blind plate valve) of the Y-type filter 25 in the coke oven gas pipeline bypass 22 is automatically opened, and the valve group (electric butterfly valve 23 and glasses valve 24) of the Y-type filter 25 in the coke oven gas main pipeline 21 is closed. At this time, the coke oven gas compressor is supplied with gas from the coke oven gas pipeline bypass 22, which does not affect the continuous production of the hydrogen metallurgical system; S3, after the coke oven gas compressor switches the coke oven gas pipeline bypass 22 to supply gas, the device gives a cleaning operation signal; S4, open the vent pipe electric valve 3 on the vent pipe 2 in the Y-type filter 25 on the coke oven gas main pipeline 21, drive the motor 7 to rotate the screw 5 through the driving gear set 10, drive the lifting mechanism 11 to drive the physical cleaning device 12 to move along the axis direction of the inner wall of the filter screen 13, and set the upper limit switch 41 and the lower limit switch 42 at the upper and lower ends of the Y-type filter 25 respectively. The drive motor 7 runs forward, drives the physical cleaning device 12 to reach the upper limit position, contacts the upper limit switch 41 and sends a control signal to stop the drive motor 7; after the drive motor 7 stops, it switches to reverse operation, drives the physical cleaning device 12 to move downward, and when it reaches the lower limit, the lower limit switch 42 gives a control signal, and the drive motor 7 stops running and switches to forward operation. Repeat the above process for multiple times, and the repeated process is generally 5-7 times, so that the inner surface of the filter screen 13 can be cleaned; S5, at the same time, the high-pressure steam drum 27 passes through the high-pressure steam pipeline 26 and the steam pipeline valve to the Y-type filter 25, so that the naphthalene of the impurities bonded on the surface of the filter screen 13 is sublimated, and the high-temperature and high-pressure steam is carried by the naphthalene steam and other impurities through the vent pipe 2 to release the self-cleaning function; S6. After cleaning is completed, the steam pipe valve of the Y-type filter 25 is closed, and the steam is stopped from entering. The physical cleaning device 12 is lowered to the position of the lower limit switch 42, and the valve group (electric butterfly valve 23 and glasses valve 24) at the air inlet of the Y-type filter 25 in the coke oven gas main pipeline 21 is opened. The residual steam in the Y-type filter 25 is driven out through the vent pipe 2 using coke oven gas. After the coke oven gas of the Y-type filter 25 is qualified, the valve group (electric butterfly valve 23 and glasses valve 24) at the air inlet of the Y-type filter 25 is closed. At this time, the Y-type filter 25 of the coke oven gas main pipeline 21 is cleaned and is in a standby state. When the Y-type filter 25 of the coke oven gas pipeline bypass 22 is seriously blocked, switch to the coke oven gas main pipeline 21 for gas supply, and the Y-type filter 25 of the coke oven gas pipeline bypass 22 is cleaned.

[0040] By using the above operation, the filter screen is equipped with a physical cleaning device 12, and high-temperature and high-pressure steam is introduced to heat and sublime the naphthalene condensed on the filter screen with the high-temperature and high-pressure steam, and at the same time, the physical cleaning device is used to clean other dirt attached to the surface of the filter screen 13, and the high-temperature and high-pressure steam is taken out through the vent pipe 2 to realize the self-cleaning function of the Y-type filter screen. The overall structure of this patent is simple, the design is reasonable, it does not affect the continuous production of the hydrogen metallurgical system, ensures the safety of the operators, and has a high value of promotion and use.

Claims

1. A Y-type filter screen self-cleaning device, characterized in that: It includes a dual-circuit gas supply mechanism, a cleaning mechanism, and a high-pressure steam introduction mechanism; The dual-path gas supply mechanism comprises a coke oven gas main pipeline (21) and a coke oven gas pipeline bypass (22) connected to the coke oven gas. The coke oven gas main pipeline (21) and the coke oven gas pipeline bypass (22) are both provided with a Y-type filter (25). The gas inlet and outlet of each Y-type filter (25) are connected to a valve group via a flange. A pressure sensor (1) is installed at the upper opening on the inner side of the flange of the gas inlet and outlet. The valve group is linked to the pressure sensor (1). The cleaning mechanism and the high-pressure steam introduction mechanism are both linked to the valve group. The cleaning mechanism comprises a discharge pipe (2) arranged at the top of the Y-type filter (25), a discharge pipe electric valve (3) installed on the discharge pipe (2) and linked to the valve group, a drive motor (7) linked to the valve group, a drive gear group (10) connected to the drive motor (7), a screw (5) connected to the drive gear group (10), a lifting mechanism (11) rotatably connected to the screw (5), and a physical cleaning device (12) connected to the lifting mechanism (11), wherein the physical cleaning device (12) moves along the axial direction of the inner wall of the filter screen (13) of the Y-type filter (25); The high-pressure steam introduction mechanism comprises a high-pressure steam drum (27), a high-pressure steam pipeline (26) connected to the high-pressure steam drum (27), and a steam pipeline valve arranged on the high-pressure steam pipeline (26). The steam pipeline valve and the valve group are linked. The high-pressure steam pipeline (26) introduces high-temperature and high-pressure steam into the Y-type filter, so that naphthalene adhered to the surface of the filter screen (13) is sublimated, and the high-temperature and high-pressure steam carrying naphthalene vapor and other sundries is discharged through the discharge pipe (2), thereby realizing a self-cleaning function.

2. A Y-type filter screen self-cleaning device according to claim 1, characterized in that: The valve group comprises an electric butterfly valve (23) and a glasses valve (24), wherein the glasses valve (24) is closer to the Y-type filter (25) than the electric butterfly valve (23).

3. A Y-type filter screen self-cleaning device according to claim 1, characterized in that: The lifting mechanism (11) is provided with a thread, and the thread fits with the screw (5); the upper and lower ends of the screw (5) are respectively connected with an upper connecting spline (54) and a lower connecting spline (56); the upper connecting spline (54) and the lower connecting spline (56) are respectively connected with an upper shaft (53) and a lower shaft (55); the ends of the upper shaft (53) and the lower shaft (55) are both installed with bearings (57); the bearing (57) of the upper shaft (53) is connected with a bearing seat inside the Y-type filter (25); the center of the bearing seat and the center of the filter (13) are on the same axis; the bearing (57) of the lower shaft (55) is connected with a manhole blind plate of the Y-type filter (25); and the protruding part of the lower shaft (55) is connected with a driving gear set (10) through a spline.

4. A Y-type filter screen self-cleaning device according to claim 3, characterized in that: The device also includes a drive housing (9), which is arranged below the manhole blind plate at the bottom of the Y-type filter (25). The drive housing (9) includes a housing, a coupling (92) connected to the output end of the drive motor (7), a threaded roller (93) connected to the coupling (92), a gear (94) engaged with the threaded roller (93), and a mounting base (96) arranged on both sides of the threaded roller (93) through a bearing (57). The mounting base (96) is connected to the bottom of the housing, and the gear (94) is connected to the lower shaft (55). The lower shaft (55) penetrates into the housing. An equipment mounting hole (99) is provided on the outer wall of the housing, and the equipment mounting hole (99) is fastened to the manhole blind plate and flange at the bottom of the Y-type filter (25) by bolts. The driving motor (7), the coupling (92), the threaded roller (93), the gear (94), and the mounting base (96) are all located in the box; The bottom of the box is also connected to a nitrogen pipeline (8), and a nitrogen pipeline valve is provided on the nitrogen pipeline (8). A second pressure sensor is installed inside the nitrogen pipeline valve. The nitrogen pipeline (8) and the nitrogen pipeline valve are used to fill the driving box (9) with nitrogen and maintain pressure. The pressure of the driving box (9) is greater than or equal to the maximum working pressure of the coke oven gas pipeline. The nitrogen pipeline valve is linked to the second pressure sensor.

5. A Y-type filter screen self-cleaning device according to claim 1, characterized in that: The physical cleaning device (12) comprises a circular ring body (15) arranged on the lifting mechanism (11), a flexible brush arranged on the outer wall of the circular ring body (15), and a connecting device (6) arranged on the inner wall of the circular ring body (15) and rigidly connected to the lifting mechanism (11). The diameter of the circular ring body (15) is smaller than the filter screen (13). After the flexible brush is bonded, the outer diameter of the circular ring body (15) is larger than the filter screen (13). After the lifting mechanism (11) and the physical cleaning device (12) are connected, a spoke wheel structure is formed. The spoke wheel structure allows high-temperature steam to pass through.

6. A Y-type filter screen self-cleaning device according to claim 5, characterized in that: The flexible brush is bonded to the outer wall of the annular ring, and the connecting device (6) is a spoke, the number of which is 5 to 12.

7. A Y-type filter screen self-cleaning device according to any one of claims 1 to 6, characterized in that: An upper limit switch (41) and a lower limit switch (42) are also installed inside the Y-type filter (25). The upper limit switch (41) and the lower limit switch (42) are respectively arranged at the upper limit position and the lower limit position of the filter screen (13).

8. A Y-type filter screen self-cleaning device according to claim 7, characterized in that: A manual valve is also installed on the vent pipe (2). The manual valve is in a normally open state and is used to close the vent pipe when inspecting it.

9. A Y-type filter screen self-cleaning method, using the above self-cleaning device, characterized in that The steps include: The pressure sensor (1) of the S1, Y-type filter (25) detects the pressure difference between the inlet and outlet ports and identifies the degree of clogging of the filter (13); S2. When the pressure difference exceeds the set threshold, the valve group of the Y-type filter (25) in the coke oven gas pipeline bypass (22) is automatically opened, and the valve group of the Y-type filter (25) in the coke oven gas main pipeline (21) is closed. At this time, the coke oven gas compressor is supplied with gas from the coke oven gas pipeline bypass (22), and the continuous production of the hydrogen metallurgical system is not affected; S3, after the coke oven gas compressor switches the coke oven gas pipeline bypass (22) to supply gas, a cleaning operation signal is given; S4, opening the discharge pipe electric valve (3) on the discharge pipe (2) in the Y-type filter (25), driving the motor (7) to rotate the screw (5) through the driving gear set (10), driving the lifting mechanism (11) to drive the physical cleaning device (12) to move along the axis direction of the inner wall of the filter (13), and the upper and lower ends of the Y-type filter (25) are respectively provided with an upper limit switch (41) and a lower limit switch (42). The driving motor (7) runs in the forward direction, driving the physical cleaning device (12) to reach the upper limit position, and contacts the upper limit switch (41) and sends a control signal to the driving motor (7) to stop running; after the driving motor (7) stops steadily, it switches to reverse operation, driving the physical cleaning device (12) to run downward, and when it reaches the lower limit, the lower limit switch (42) sends a control signal, and the driving motor (7) stops running and switches to forward operation. The above process is repeated multiple times to clean the inner surface of the filter (13); S5. At the same time, a high-temperature and high-pressure steam is introduced from a high-pressure steam drum (27) through a high-pressure steam pipe (26) and a steam pipe valve to the Y-type filter (25), so that impurities adhering to the surface of the filter screen (13) are sublimated, and the impurities carried by the high-temperature and high-pressure steam are discharged through a discharge pipe (2), thereby realizing a self-cleaning function; S6. After the cleaning is completed, the steam pipe valve of the Y-type filter (25) is closed, the steam supply is stopped, the physical cleaning device (12) is lowered to the position of the lower limit switch (42), the valve group at the air inlet of the Y-type filter (25) in the coke oven gas main pipeline (21) is opened, and the residual steam in the Y-type filter (25) is driven out through the vent pipe (2) using coke oven gas. After the coke oven gas in the Y-type filter (25) is qualified, the valve group at the air inlet of the Y-type filter (25) is closed; at this time, the Y-type filter (25) of the coke oven gas main pipeline (21) is cleaned and is in a standby state; when the Y-type filter (25) of the coke oven gas pipeline bypass (22) is seriously blocked, the gas supply is switched to the coke oven gas main pipeline (21), and the Y-type filter (25) of the coke oven gas pipeline bypass (22) is cleaned.

10. A Y-type filter screen self-cleaning method according to claim 9, characterized in that: In S4, the process is repeated 5-7 times.

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